The diagnostic performance of the tumor cells in BALF for relapse after treatment (sensitivity = 0.829; specificity = 0.869; AUC = 0.871; ROC = 0.963) is also significantly higher than that of the serum tumor markers, such as NSE, CEA, and CA125 (all AUC-ROC < 0. This evidence concerns the gene CEACAM5 and neoplasm.